Seat-spider.



PATENTED JUNE 26, 1906.

H. W. BOLENS.

SEAT SPIDER.

' APPLICATION FILED APE.24,1903.

UNITED STA TES PATENT OFFICE.

SEAT-SPIDER.

Specification of Letters Patent.

Patented June 26, 1906.

Application filed April 24,1903. Serial No 154,107.

To ctZZ whom it may concern;-

Be it known that I, HARRY W. BOLENS, a citizen of the United States, anda resident of Port Washington, in the county of Ozaukee and State ofI/Visconsin, have invented certain new and useful Improvements in Seat-Spiders and I do hereby declare that the following is a full, clear, andexact description thereof.

My invention consists in certain peculiarities of construction andcombination of parts hereinafter particularly set forth, with referenceto the accompanying drawings, and subsequently claimed, its object beingto provide simple, economical, light, strong, and durable spiders forthe chair and stool trade, each spider being of the species in whichprimarily independent parallel metal arms attachable at their ends to achair or stool seat are combined with a suitable spreader that may be ofcast metal or otherwise, as found preferable in practice, the one hereinshown being of the cast-metal variety. 2

Figure 1 of the drawings represents a side elevation of a tilt-seatspider made in accordance with my invention; Fig. 2, a plan view ofsame, partly in horizontal section; Fig. 3, a transverse sectional viewof the spider, this view being indicated by lines 3 3 in the secondfigure; Fig. 4, a partly sectional detail view illustrating a reversalof what is shown in the above-described figures; Fig. 5, a perspectiveview of a fragment of a spider-arm that is made three-ply in a verticaldirection, and Fig. 6 a similar view showing that the vertical portionof each spider-arm may be corrugated in the direction of its width andlength.

Referring by letter to the drawings, A indicates each of the primarilyindependent parallel arms, and B the spreader of an improved chair orstool seat spider. Each spider-arm is of rolled metal, for the most partangular in the form of a T, inverted or otherwise. The vertical portionof each spider-arm is of less length than the horizontal portion, andsaid arm is elevated at its ends, these ends being apertured for theengagement of fastening devices by which the spider is made fast to achair or stool seat.

The horizontal portion of each spider-arm rests fiat on the spreader B,and this spreader is shown provided with lips I), that overlap thespider-arms. Rivets c are shown extending through openings provided inthe spreader,

and these rivets engage notches with which edges of the horizontalportions ofthe spiderarms are provided, heads of the rivets being inlapping contact with said arms,- The rivets hold the spider-arms in snugengagement with the recesses under the spreader-lips 6 herein shown; butit is to be understood that other rivets may be substituted for saidlips, in which case said spider-arms will be held on the spreader byvertical rivets only. By notching the spider-arms to engage the rivetssaid arms are not weakened, as would be the gage if they were punchedout to form rivet- The general outlines of the spreader B may beindefinitely varied from what is herein shown, and the vertical portionsof the spiderarms may extend up or down, according to the way saidspreader is made in practice to suit the demands of the trade, thespiderarm illustrated in Fig. 4 being the reverse of those shown in theother figures. For tiltseat spiders the spreader is provided Withdepending pivot-ears d and lugs e for the support of spiral tensionsprings, as is customary in the art, and while said spreader is hereinshown as being a casting it may be sheet metal of suitable strength.

Each spider arm is herein shown in most instances as having two-plyhorizontal and vertical portions, although made from a single piece ofmetal; but, as shown in Fig. 5,its

vertical portion may be made three-ply by employing sufiicient metal andproperly folding the same. It is also to be understood that ordinarycommercial T-iron of sufficient strength may be found suitable for thespiderarms.

As shown in Fig. 6, each spider-arm may be stiffened by corrugating itsvertical portions, and the corrugations may be in the direction of thewidth or length, or both, of said vertical portion of the arm.

It is preferable, as herein shown, to have the vertical or stem portionof each spiderarm of a depth greater than the width of the horizontalportion of said arm from the center of the same in either direction,whereby greater rigidity is obtained.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A seat-spider comprising primarily-independent parallel-rolled metalT-arms, a spreader supporting the arms, spreader-lips lapping horizontalportions of the arms, and rivets engaging the spreader and edge notchesof the spider-arms to hold the latter in snug pngagement with recessesunder the spreaderips.

2. A seat-spider comprising a spreader, parallel primarily-independentT-arms the horizontal portions of which rest fiat upon the spreader, andfastening devices in con nection with said spreader opposing the edgesof said horizontal portions of said arms.

3. A seatspider comprising a spreader, parallel primarily-independentT-arms having the vertical portions of each of less length than thehorizontal portion thereof that rests fiat upon the spreader, andfastening devices in connection with said spreader in opposition to theedges of said horizontal portions of said arms.

4. A seat-spider comprising a spreader, parallel primarily-independentT-arms the horizontal portions of which rest flat upon the spreader, andrivets that engage the spreader, oppose edges of said horizontalportions of the arms and are headed on the same.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in the county of Milwaukee and State of Wisconsin, in thepresence of two Witnesses.

HARRY W. BOLENS.

Witnesses:

N. E. OLIPHANT, E. W. HELLER.

